“I just got off stage 15 minutes ago, so the adrenaline is still pumping” Nate Ruess said as he chatted with Fuse behind the scenes at Washington D.C.’s first-ever Landmark Music Festival this weekend. The Fun. singer shared his thoughts on the art of playing a sunset festival set, the Nation’s capitol, and the good times surrounding his recent solo album, “Grand Romantic.” Check out the interview in the video player above.